Finding the Fourth Proportional to 231,168.72, 318,996.72 and 130,547.28

Step by Step Solution

1. Step 1: Write the proportion equation
   231,168.72 : 318,996.72 = 130,547.28 : x
2. Step 2: Convert to fraction form
   231,168.72/318,996.72 = 130,547.28/x
3. Step 3: Cross multiply
   231,168.72x = 318,996.72 × 130,547.28
4. Step 4: Simplify right side
   231,168.72x = 41,644,154,124.92
5. Step 5: Solve for x
   x = 41,644,154,124.92/231,168.72
6. Step 6: Final answer
   x = 180,146.15